Fix resolution of values for Config API0.9.3

Issue-ID: MULTICLOUD-1414
Signed-off-by: Lukasz Rajewski <lukasz.rajewski@orange.com>
Change-Id: Ibca5846ffe083bfc4d505c4c3c13efac2c6e2426

7 files changed, 112 insertions, 42 deletions

diff --git a/src/k8splugin/internal/app/config_backend.go b/src/k8splugin/internal/app/config_backend.go
index 1f22922a..c365363f 100644
--- a/src/k8splugin/internal/app/config_backend.go
+++ b/src/k8splugin/internal/app/config_backend.go
@@ -461,7 +461,7 @@ func applyConfig(instanceID string, p Config, pChannel chan configResourceList,
 		return []helm.KubernetesResource{}, pkgerrors.Wrap(err, "Retrieving model info")
 	}
 	// Get Template and Resolve the template with values
-	crl, err := resolve(rbName, rbVersion, profileName, p, releaseName)
+	crl, err := resolve(rbName, rbVersion, profileName, instanceID, p, releaseName)
 	if err != nil {
 		return []helm.KubernetesResource{}, pkgerrors.Wrap(err, "Resolve Config")
 	}
@@ -571,11 +571,12 @@ func scheduleResources(c chan configResourceList) {
 
 //Resolve returns the path where the helm chart merged with
 //configuration overrides resides.
-var resolve = func(rbName, rbVersion, profileName string, p Config, releaseName string) (configResourceList, error) {
+var resolve = func(rbName, rbVersion, profileName, instanceId string, p Config, releaseName string) (configResourceList, error) {
 
 	var resTemplates []helm.KubernetesResourceTemplate
 
-	profile, err := rb.NewProfileClient().Get(rbName, rbVersion, profileName)
+	profileClient := rb.NewProfileClient()
+	profile, err := profileClient.Get(rbName, rbVersion, profileName)
 	if err != nil {
 		return configResourceList{}, pkgerrors.Wrap(err, "Reading Profile Data")
 	}
@@ -593,8 +594,42 @@ var resolve = func(rbName, rbVersion, profileName string, p Config, releaseName
 		return configResourceList{}, pkgerrors.Wrap(err, "Downloading Template")
 	}
 
+	ic := NewInstanceClient()
+	instance, err := ic.Get(instanceId)
+	if err != nil {
+		return configResourceList{}, pkgerrors.Wrap(err, "Getting Instance")
+	}
+
+	var finalReleaseName string
+
+	if releaseName == "" {
+		finalReleaseName = profile.ReleaseName
+	} else {
+		finalReleaseName = releaseName
+	}
+
+	helmClient := helm.NewTemplateClient(profile.KubernetesVersion,
+		profile.Namespace,
+		finalReleaseName)
+
+	//copy values from the instance
+	valuesArr := []string{}
+	if instance.Request.OverrideValues != nil {
+		for k, v := range instance.Request.OverrideValues {
+			valuesArr = append(valuesArr, k+"="+v)
+		}
+	}
+	valuesArr = append(valuesArr, "k8s-rb-instance-id="+instanceId)
+	rawValues, err := helmClient.ProcessValues([]string{}, valuesArr)
+	if err != nil {
+		return configResourceList{}, pkgerrors.Wrap(err, "Processing values")
+	}
+
+	for k, v := range p.Values {
+		rawValues[k] = v
+	}
 	//Create a temp file in the system temp folder for values input
-	b, err := json.Marshal(p.Values)
+	b, err := json.Marshal(rawValues)
 	if err != nil {
 		return configResourceList{}, pkgerrors.Wrap(err, "Error Marshalling config data")
 	}
@@ -613,26 +648,21 @@ var resolve = func(rbName, rbVersion, profileName string, p Config, releaseName
 	}
 	defer outputfile.Close()
 
-	chartBasePath, err := rb.ExtractTarBall(bytes.NewBuffer(def))
+	//Download and process the profile first
+	//If everything seems okay, then download the config templates
+	prYamlClient, err := profileClient.GetYamlClient(rbName, rbVersion, profileName)
 	if err != nil {
-		return configResourceList{}, pkgerrors.Wrap(err, "Extracting Template")
+		return configResourceList{}, pkgerrors.Wrap(err, "Processing Profile Manifest")
 	}
 
-	var finalReleaseName string
-
-	if releaseName == "" {
-		finalReleaseName = profile.ReleaseName
-	} else {
-		finalReleaseName = releaseName
+	chartBasePath, err := rb.ExtractTarBall(bytes.NewBuffer(def))
+	if err != nil {
+		return configResourceList{}, pkgerrors.Wrap(err, "Extracting Template")
 	}
 
-	helmClient := helm.NewTemplateClient(profile.KubernetesVersion,
-		profile.Namespace,
-		finalReleaseName)
-
 	chartPath := filepath.Join(chartBasePath, t.ChartName)
 	resTemplates, crdList, _, err := helmClient.GenerateKubernetesArtifacts(chartPath,
-		[]string{outputfile.Name()},
+		[]string{prYamlClient.GetValues(), outputfile.Name()},
 		nil)
 	if err != nil {
 		return configResourceList{}, pkgerrors.Wrap(err, "Generate final k8s yaml")
diff --git a/src/k8splugin/internal/app/config_test.go b/src/k8splugin/internal/app/config_test.go
index 0cc3c3ce..1aef6656 100644
--- a/src/k8splugin/internal/app/config_test.go
+++ b/src/k8splugin/internal/app/config_test.go
@@ -91,7 +91,7 @@ func TestCreateConfig(t *testing.T) {
 			db.Etcd = testCase.mockdb
 			db.DBconn = provideMockModelData(testCase.instanceID, testCase.rbName,
 				testCase.rbVersion, testCase.profileName)
-			resolve = func(rbName, rbVersion, profileName string, p Config, releaseName string) (configResourceList, error) {
+			resolve = func(rbName, rbVersion, profileName, instanceId string, p Config, releaseName string) (configResourceList, error) {
 				return configResourceList{}, nil
 			}
 			impl := NewConfigClient()
@@ -204,7 +204,7 @@ func TestRollbackConfig(t *testing.T) {
 			db.Etcd = testCase.mockdb
 			db.DBconn = provideMockModelData(testCase.instanceID, testCase.rbName,
 				testCase.rbVersion, testCase.profileName)
-			resolve = func(rbName, rbVersion, profileName string, p Config, releaseName string) (configResourceList, error) {
+			resolve = func(rbName, rbVersion, profileName, instanceID string, p Config, releaseName string) (configResourceList, error) {
 				return configResourceList{}, nil
 			}
 			impl := NewConfigClient()
diff --git a/src/k8splugin/internal/app/instance.go b/src/k8splugin/internal/app/instance.go
index e50a59e5..71042f08 100644
--- a/src/k8splugin/internal/app/instance.go
+++ b/src/k8splugin/internal/app/instance.go
@@ -224,18 +224,21 @@ func (v *InstanceClient) Create(i InstanceRequest) (InstanceResponse, error) {
 		postDeleteTimeout = 600
 	}
 
+	id := namegenerator.Generate()
+
+	overrideValues = append(overrideValues, "k8s-rb-instance-id="+id)
+
 	//Execute the kubernetes create command
 	sortedTemplates, crdList, hookList, releaseName, err := rb.NewProfileClient().Resolve(i.RBName, i.RBVersion, i.ProfileName, overrideValues, i.ReleaseName)
 	if err != nil {
+		namegenerator.Release(id)
 		return InstanceResponse{}, pkgerrors.Wrap(err, "Error resolving helm charts")
 	}
 
-	// TODO: Only generate if id is not provided
-	id := namegenerator.Generate()
-
 	k8sClient := KubernetesClient{}
 	err = k8sClient.Init(i.CloudRegion, id)
 	if err != nil {
+		namegenerator.Release(id)
 		return InstanceResponse{}, pkgerrors.Wrap(err, "Getting CloudRegion Information")
 	}
 
@@ -273,19 +276,21 @@ func (v *InstanceClient) Create(i InstanceRequest) (InstanceResponse, error) {
 		PostDeleteTimeout:  postDeleteTimeout,
 	}
 
+	err = k8sClient.ensureNamespace(profile.Namespace)
+	if err != nil {
+		namegenerator.Release(id)
+		return InstanceResponse{}, pkgerrors.Wrap(err, "Creating Namespace")
+	}
+
 	key := InstanceKey{
 		ID: id,
 	}
 	err = db.DBconn.Create(v.storeName, key, v.tagInst, dbData)
 	if err != nil {
+		namegenerator.Release(id)
 		return InstanceResponse{}, pkgerrors.Wrap(err, "Creating Instance DB Entry")
 	}
 
-	err = k8sClient.ensureNamespace(profile.Namespace)
-	if err != nil {
-		return InstanceResponse{}, pkgerrors.Wrap(err, "Creating Namespace")
-	}
-
 	if len(crdList) > 0 {
 		log.Printf("Pre-Installing CRDs")
 		_, err = k8sClient.createResources(crdList, profile.Namespace)
@@ -303,6 +308,8 @@ func (v *InstanceClient) Create(i InstanceRequest) (InstanceResponse, error) {
 			err2 := db.DBconn.Delete(v.storeName, key, v.tagInst)
 			if err2 != nil {
 				log.Printf("Error cleaning failed instance in DB, please check DB.")
+			} else {
+				namegenerator.Release(id)
 			}
 			return InstanceResponse{}, pkgerrors.Wrap(err, "Error running preinstall hooks")
 		}
@@ -314,6 +321,8 @@ func (v *InstanceClient) Create(i InstanceRequest) (InstanceResponse, error) {
 		err2 := db.DBconn.Delete(v.storeName, key, v.tagInst)
 		if err2 != nil {
 			log.Printf("Delete Instance DB Entry for release %s has error.", releaseName)
+		} else {
+			namegenerator.Release(id)
 		}
 		return InstanceResponse{}, pkgerrors.Wrap(err, "Update Instance DB Entry")
 	}
@@ -330,6 +339,8 @@ func (v *InstanceClient) Create(i InstanceRequest) (InstanceResponse, error) {
 		err2 := db.DBconn.Delete(v.storeName, key, v.tagInst)
 		if err2 != nil {
 			log.Printf("Delete Instance DB Entry for release %s has error.", releaseName)
+		} else {
+			namegenerator.Release(id)
 		}
 		return InstanceResponse{}, pkgerrors.Wrap(err, "Create Kubernetes Resources")
 	}
diff --git a/src/k8splugin/internal/helm/helm.go b/src/k8splugin/internal/helm/helm.go
index b27c8aee..846366e4 100644
--- a/src/k8splugin/internal/helm/helm.go
+++ b/src/k8splugin/internal/helm/helm.go
@@ -72,9 +72,9 @@ func NewTemplateClient(k8sversion, namespace, releasename string) *TemplateClien
 	}
 }
 
-// Combines valueFiles and values into a single values stream.
+// ProcessValues Combines valueFiles and values into a single values stream.
 // values takes precedence over valueFiles
-func (h *TemplateClient) processValues(valueFiles []string, values []string) (map[string]interface{}, error) {
+func (h *TemplateClient) ProcessValues(valueFiles []string, values []string) (map[string]interface{}, error) {
 	settings := cli.New()
 	providers := getter.All(settings)
 	options := helmOptions.Options{
@@ -121,7 +121,7 @@ func (h *TemplateClient) GenerateKubernetesArtifacts(inputPath string, valueFile
 	}
 
 	// get combined values and create config
-	rawVals, err := h.processValues(valueFiles, values)
+	rawVals, err := h.ProcessValues(valueFiles, values)
 	if err != nil {
 		return retData, crdData, hookList, err
 	}
diff --git a/src/k8splugin/internal/helm/helm_test.go b/src/k8splugin/internal/helm/helm_test.go
index 951ff92b..8f0269ab 100644
--- a/src/k8splugin/internal/helm/helm_test.go
+++ b/src/k8splugin/internal/helm/helm_test.go
@@ -95,7 +95,7 @@ func TestProcessValues(t *testing.T) {
 	for _, testCase := range testCases {
 		t.Run(testCase.label, func(t *testing.T) {
 			tc := NewTemplateClient("1.12.3", "testnamespace", "testreleasename")
-			out, err := tc.processValues(testCase.valueFiles, testCase.values)
+			out, err := tc.ProcessValues(testCase.valueFiles, testCase.values)
 			if err != nil {
 				if testCase.expectedError == "" {
 					t.Fatalf("Got an error %s", err)
diff --git a/src/k8splugin/internal/namegenerator/namegenerator.go b/src/k8splugin/internal/namegenerator/namegenerator.go
index 52eef366..0a49633a 100644
--- a/src/k8splugin/internal/namegenerator/namegenerator.go
+++ b/src/k8splugin/internal/namegenerator/namegenerator.go
@@ -141,8 +141,28 @@ func (c *cache) generateName() string {
 	}
 }
 
+func (c *cache) releaseName(name string) {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+
+	c.init()
+
+	if c.isAlreadyUsed(name) {
+		c.cache[name] = false
+
+		// Update the cache and db
+		c.writeCacheToDB()
+	}
+}
+
 // Generate returns an autogenerated name
 func Generate() string {
 
 	return nameCache.generateName()
 }
+
+// Release name from cache
+func Release(name string) {
+
+	nameCache.releaseName(name)
+}
diff --git a/src/k8splugin/internal/rb/profile.go b/src/k8splugin/internal/rb/profile.go
index 77398580..ac90a63b 100644
--- a/src/k8splugin/internal/rb/profile.go
+++ b/src/k8splugin/internal/rb/profile.go
@@ -279,6 +279,25 @@ func (v *ProfileClient) Download(rbName, rbVersion, prName string) ([]byte, erro
 	return nil, pkgerrors.New("Error downloading Profile content")
 }
 
+//GetYamlClient GEt Yaml Files client for profile
+func (v *ProfileClient) GetYamlClient(rbName string, rbVersion string, profileName string) (ProfileYamlClient, error) {
+	prData, err := v.Download(rbName, rbVersion, profileName)
+	if err != nil {
+		return ProfileYamlClient{}, pkgerrors.Wrap(err, "Downloading Profile")
+	}
+
+	prPath, err := ExtractTarBall(bytes.NewBuffer(prData))
+	if err != nil {
+		return ProfileYamlClient{}, pkgerrors.Wrap(err, "Extracting Profile Content")
+	}
+
+	prYamlClient, err := ProcessProfileYaml(prPath, v.manifestName)
+	if err != nil {
+		return ProfileYamlClient{}, pkgerrors.Wrap(err, "Processing Profile Manifest")
+	}
+	return prYamlClient, nil
+}
+
 //Resolve returns the path where the helm chart merged with
 //configuration overrides resides and final ReleaseName picked for instantiation
 func (v *ProfileClient) Resolve(rbName string, rbVersion string,
@@ -291,17 +310,7 @@ func (v *ProfileClient) Resolve(rbName string, rbVersion string,
 
 	//Download and process the profile first
 	//If everything seems okay, then download the definition
-	prData, err := v.Download(rbName, rbVersion, profileName)
-	if err != nil {
-		return sortedTemplates, crdList, hookList, finalReleaseName, pkgerrors.Wrap(err, "Downloading Profile")
-	}
-
-	prPath, err := ExtractTarBall(bytes.NewBuffer(prData))
-	if err != nil {
-		return sortedTemplates, crdList, hookList, finalReleaseName, pkgerrors.Wrap(err, "Extracting Profile Content")
-	}
-
-	prYamlClient, err := ProcessProfileYaml(prPath, v.manifestName)
+	prYamlClient, err := v.GetYamlClient(rbName, rbVersion, profileName)
 	if err != nil {
 		return sortedTemplates, crdList, hookList, finalReleaseName, pkgerrors.Wrap(err, "Processing Profile Manifest")
 	}